In the construction process of the existing highway engineering and building engineering, in order to prevent the slope of the roadbed or the foundation from sliding and ensure the stability of the roadbed, a method of building the retaining wall is adopted, and because the gravity type retaining wall is simple and convenient to take materials and construct in the building process and is widely adopted, the gravity type retaining wall utilizes the gravity of the gravity type retaining wall to completely block the water pressure and the soil pressure behind the wall. The patent of an improved truss type retaining wall structure (application number 201820860071.2) adopts a truss as a main body stress structure of the retaining wall, changes a bending structure system of a traditional retaining wall into a tension and compression structure system, and can achieve the purpose of fully utilizing the strength of materials and further reducing the construction cost. This patent has adopted preceding pile foundation and back pile foundation structure simultaneously, and this pile foundation construction needs special construction equipment, and is comparatively troublesome. A retaining wall with anchor rods combined with a main structure and a design method (201611223249.4) are characterized in that the anchor rods are arranged on the upper portion of the retaining wall to resist the lateral pressure of soil, so that the bending moment and the shearing force of the root of the retaining wall can be effectively reduced, the thickness of a wall body is reduced, the using amount of reinforcing steel bars is reduced, and the purposes of controlling the width of a crack at the bottom of the wall body and controlling the horizontal displacement at the top of the wall body are achieved. This patent has only considered reducing the thickness of retaining wall through the method of installing the stock additional on retaining wall upper portion, but has not solved the technological problem of building the retaining wall on the weak basis. The utility model provides a pile plate formula stock retaining wall (201821351942.4) patent is provided with a plurality of stocks on the steel sheet evenly perpendicularly to avoid the basic a large amount of excavation earthwork, simultaneously can effectually strut the fill soil body, reach construction convenience, safe and reliable's purpose, and can reduce construction cost, improve the efficiency of construction, the practicality is strong. The steel plate used in the patent is easy to rust, and the patent does not solve the technical problem of building the retaining wall on a weak foundation.
Disclosure of Invention
To the situation, for solving the problem that exists among the prior art, the utility model aims at providing a cushion cap formula retaining wall, can effectively solve the weak foundation and build retaining wall and the not enough problem of retaining wall intensity.
The technical scheme for solving the problem is that the pile group foundation comprises a pile group foundation consisting of a plurality of seamless steel pipes, a reinforced concrete bearing platform is fixed above the pile group foundation, a groove is arranged on the bearing platform, a precast block retaining wall body is arranged above the bearing platform, and the lower end of the wall body is arranged in the groove; the wall body is connected with the bearing platform through a plurality of steel strands; a plurality of anchor rod holes are formed in the wall body, and anchor rods fixed in the soil layer are inserted into each anchor rod hole.
The utility model discloses can reduce the requirement of building retaining wall ground bearing capacity, application scope is wider, construction convenience to can reduce the thickness of retaining wall and improve the self intensity of retaining wall, improve the stability of retaining wall.
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1 to 2, the utility model comprises a group pile foundation consisting of a plurality of seamless steel pipes 8, a reinforced concrete bearing platform 7 fixed above the group pile foundation, a groove 9 arranged on the bearing platform 7, a prefabricated block retaining wall body 2 arranged above the bearing platform 7, and the lower end of the wall body 2 arranged in the groove 9; the wall body 2 is connected with the bearing platform 7 through a plurality of steel strands 6; a plurality of anchor rod holes 3 are formed in the wall body 2, and anchor rods 4 fixed in the soil layer 1 are inserted into each anchor rod hole 3.
In order to realize the installation of the steel strand 6, a plurality of pore channels 5 which correspond up and down are respectively arranged on the wall body 2 and the bearing platform 7, and the steel strand 6 simultaneously penetrates through the pore channels 5 of the wall body 2 and the bearing platform 7; the upper end and the lower end of each steel strand 6 are welded with mechanical anchoring devices 10.
In order to realize the connection among the seamless steel pipes 8, the seamless steel pipes 8 are welded through connecting I-shaped steel.
In order to realize the connection between the bearing platform 7 and the seamless steel pipes 8, the reinforced concrete bearing platform 7 comprises a part of seamless steel pipe 8 group pile foundation and connection I-shaped steel.
In order to realize that the retaining wall has certain strength, the steel pipe of the seamless steel pipe 8 pile group foundation is a hot-rolled seamless steel pipe 8, and the diameter of the seamless steel pipe 8 is preferably 50mm-100mm, and the wall thickness is preferably 11 mm. The distance between the groups of seamless steel pipes 8 is 300-800mm, the length of a single seamless steel pipe 8 is preferably 1000-2500 mm, the seamless steel pipes can be lengthened in a welding mode according to geological conditions, and the lengthened length is 2000-5000 mm.
In order to improve the transverse stability of the retaining wall, inclined steel pipe piles 11 are arranged on the outer sides of the foundation of the seamless steel pipe 8 groups, and the inclined steel pipe piles 11 are inclined towards the outside of the foundation with the soil-entering included angle of 0-90 ℃.
In order to improve the overall stability of the grouped piles, transverse stabilizing steel 12 is arranged under the foundation of the seamless steel pipe 8 grouped piles.
The utility model discloses during the use, refer to figure 18 grouser foundation lengths of seamless steel pipe can be confirmed according to geological conditions, can use artifical or machinery to drive into soil, if 8 length of seamless steel pipe are not enough, can squeeze into the back and reuse the electric welding and connect long, wherein the seamless steel pipe 8 in the grouser outside strengthens the lateral stability of grouser to the slope of the basis outside. After the construction of all the 8 seamless steel pipes is completed, the foundation is excavated to the depth of 50-200cm, all the 8 seamless steel pipes are transversely welded by using the transverse stabilizing steel 12 supports, then the excavated foundation is backfilled, and all the seamless steel pipes 8 are welded together at the tops of the 8 seamless steel pipes by using the connecting I-shaped steel to form the integral foundation.
The method comprises the steps of digging the soil around the seamless steel pipe 8 downwards to a depth of 20-50cm, installing a prestressed pipeline, prestressed steel strands 6 and an anchoring device 10 on the I-shaped steel, then pouring the seamless steel pipe 8 pile and the I-shaped steel into a bearing platform 7, and reserving a groove 9 for inserting the prefabricated retaining wall body 2 into the bearing platform 7 at the upper part of the bearing platform 7.
The prefabricated reinforced concrete retaining wall body 2 is installed on a bearing platform 7, the prestressed steel strands 6 are inserted into the prestressed hole channels 5, then the prestress is tensioned and grouted, then the anchor rods 4 are drilled and installed in the anchor rods 4, finally the grouting is carried out, and the construction of the combined retaining wall is finally completed.
This device can reduce the requirement of building retaining wall ground bearing capacity, and application scope is wider, construction convenience to can reduce the thickness of retaining wall and improve the self intensity of retaining wall, improve the stability of retaining wall.
This device has adopted seamless steel pipe 8 to constitute a crowd's pile foundation, can be applicable to different geological conditions, also can realize stable support on soft base to realize retaining wall's installation.
The device adopts the steel strand 6 to realize the connection between the wall body 2 and the bearing platform 7, so that the two can be tightly combined to realize the support of the wall body 2; meanwhile, under the action of the anchor rod 4, the wall body 2 can resist the soil layer 1 by means of the force of the soil layer 1; increasing the strength of the device.